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Texas Instruments SN74CBTS6800DGVR
- Part No.:
- SN74CBTS6800DGVR
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 24-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74CBTS6800DGVR.pdf
- Description:
- IC BUS SWITCH 10 X 1:1 24TVSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,103
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Product details
Overview
SN74CBTS6800DGVR from Texas Instruments is a 10-bit FET bus switch with precharged outputs and Schottky diode clamping, designed for live-insertion applications in backplane and hot-swap systems. It features 5-Ω on-state resistance, TTL-compatible inputs, bidirectional signal routing, B-port precharge to user-selectable BIASV, and –2-V undershoot clamping via integrated Schottky diodes.
For engineers reviewing the SN74CBTS6800DGVR datasheet, SN74CBTS6800DGVR pinout, SN74CBTS6800DGVR application, or SN74CBTS6800DGVR equivalent, key selection criteria include low propagation delay (0.25 ns typical), bias-voltage-controlled precharge behavior, thermal performance (θJA = 86°C/W), and TVSOP-24 package compatibility with high-density PCB layouts.
Technical Context
The SN74CBTS6800DGVR implements a single-enable, 10-bit analog bus switch using FET-based transmission gates. Its control logic is active-low: ON = low enables A↔B conduction; ON = high disconnects A and B while precharging B-port terminals to BIASV through an internal ~10-kΩ path.
Each I/O pair includes integrated Schottky clamps to limit negative transients to –2 V, and all ports support TTL-level input thresholds (VIL ≤ 0.8 V, VIH ≥ 2 V) with supply range VCC = 4–5.5 V and BIASV = 1.3 V to VCC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| On-state resistance (ron) | 3–7 Ω at VCC = 4.5 V, enabling near-zero insertion loss for high-speed digital signals. |
| Propagation delay (tpd) | 0.25 ns typical at VCC = 5 V, CL = 50 pF - supports >1 GHz signal integrity in point-to-point buses. |
| BIASV range | 1.3 V to VCC - allows configurable precharge level to match system termination or reduce ground bounce during hot-plug. |
| Undershoot clamping | –2 V via integrated Schottky diodes - protects downstream receivers from negative transients during live insertion. |
| Supply voltage (VCC) | 4 V to 5.5 V - compatible with 5-V TTL and mixed-voltage 3.3/5-V backplane interfaces. |
| Input capacitance (Ci) | 3.5 pF - minimizes capacitive loading on control lines and preserves timing margins. |
| Off-state I/O capacitance (Cio(OFF)) | 4.5 pF - ensures minimal crosstalk and signal coupling when switch is disabled. |
Pinout & Package
SN74CBTS6800DGVR uses a 24-pin TVSOP (Thin Very Small Outline Package) with 0.4-mm lead pitch, 6.6 mm × 4.4 mm body size, and 1.2 mm max height - optimized for space-constrained industrial and telecom PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 (A1–A10) |
A-side data bus inputs/outputs | Bidirectional signal paths connected to port A; electrically identical to B-side under conduction. |
| 13, 14, 15, 16, 17, 18, 19, 20, 21, 22 (B1–B10) |
B-side data bus inputs/outputs | Bidirectional signal paths connected to port B; precharged to BIASV when ON is high. |
| 12 | VCC | Positive supply (4–5.5 V); powers internal switch FETs and bias circuitry. |
| 11 | GND | Reference ground for all I/Os, control logic, and internal precharge path. |
| 23 | ON | Active-low enable; low = A↔B connected, high = A/B isolated + B-port precharged. |
| 24 | BIASV | User-supplied bias voltage (1.3 V to VCC) setting precharge level for B-port during disable state. |
Key Features
| Feature | Design Value |
|---|---|
| Precharged B-port outputs | Reduces live-insertion noise by holding B-side at stable DC level (BIASV) instead of floating, eliminating ground bounce and false triggering. |
| Schottky diode clamping | Clamps negative transients to –2 V on all A/B I/Os, protecting FPGA/CPLD inputs without external diodes or TVS devices. |
| Low ron and Cio(OFF) | 3–7 Ω on-resistance and 4.5 pF off-capacitance preserve signal edge rate and minimize reflections in 50-Ω transmission lines. |
| TTL-compatible control interface | VIL ≤ 0.8 V / VIH ≥ 2 V thresholds allow direct connection to legacy 5-V microcontrollers and ASICs without level shifters. |
| Thermal design support | θJA = 86°C/W (TVSOP) enables operation up to 85°C ambient in compact enclosures with standard copper pour. |
Applications
| Backplane Bus Isolation | Hot-Swap Module Interface |
|---|---|
|
Use Scenario: Isolating add-in cards from main backplane during insertion/removal in telecom shelf systems. IC Role / Device Role / Timing Role: Bidirectional bus switch enabling/disabling 10-bit address/data paths between card and backplane under ON control. Use Value: Precharged B-port prevents metastability in upstream logic; Schottky clamps suppress –2 V transients induced by connector arcing. |
Use Scenario: Managing signal integrity during hot-plug of PCIe or CompactPCI modules into powered chassis. IC Role / Device Role / Timing Role: FET switch decoupling module-side I/Os from backplane until power sequencing completes and ON is asserted. Use Value: 0.25 ns tpd ensures no timing skew across 10-bit lanes; 5-Ω ron avoids signal attenuation in high-speed parallel interfaces. |
| Legacy System Bus Expansion | Industrial Control I/O Multiplexing |
|
Use Scenario: Adding new peripherals to aging 5-V TTL bus systems without redesigning controller firmware or layout. IC Role / Device Role / Timing Role: Level-transparent bridge between legacy CPU bus and modern peripheral ASICs operating at same VCC. Use Value: TTL-compatible inputs eliminate need for external translators; low capacitance (3.5 pF) preserves setup/hold timing margins. |
Use Scenario: Sharing limited microcontroller GPIOs across multiple sensor/actuator banks in programmable logic controllers. IC Role / Device Role / Timing Role: Configurable 10-bit analog switch routing sensor data or control signals to shared MCU pins under ON gating. Use Value: BIASV-adjustable precharge prevents floating inputs during reconfiguration; Schottky clamps suppress ESD-induced latch-up in factory environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10-bit FET bus switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74CBT16210DGGR | 16-bit, dual 8-bit configuration; no BIASV pin; higher ron (6–12 Ω); θJA = 72°C/W (TSSOP-48). | Supports wider data buses but lacks precharge control; requires external bias network for live-insertion noise mitigation. | Choose when 16-bit width is required and BIASV configurability is not critical. |
| SN74CBTLV3245PWR | 8-bit, LVTTL-compatible; lower VCC range (2.3–3.6 V); no Schottky clamps; ron = 4–8 Ω. | Designed for 3.3-V systems only; unsuitable for 5-V backplanes or –2-V transient suppression. | Choose for cost-sensitive 3.3-V embedded designs where undershoot clamping is handled externally. |
Compared with SN74CBTS6800DGVR, SN74CBT16210DGGR offers greater bit width but sacrifices precharge control and undershoot protection, while SN74CBTLV3245PWR targets lower-voltage domains and omits integrated clamping - making SN74CBTS6800DGVR uniquely suited for robust 5-V hot-swap isolation.
Availability
SN74CBTS6800DGVR is available at Aetrix Electronics and suitable for backplane bus isolation, hot-swap module interfaces, and legacy TTL system expansion requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for SN74CBTS6800DGVR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.
The SN74CBTS6800DGVR belongs to TI's CBTS-series bus switches - engineered specifically for live-insertion reliability in telecom backplanes and modular computing systems where signal integrity and transient immunity are critical.
FAQ
What is the maximum undershoot voltage the SN74CBTS6800DGVR can clamp?
The SN74CBTS6800DGVR integrates Schottky diodes on all I/Os that clamp negative transients to –2 V, as specified in the absolute maximum ratings. This clamping behavior is guaranteed across the full operating temperature range (–40°C to 85°C) and applies to both A- and B-side terminals during live-insertion events. The SN74CBTS6800DGVR does not require external diodes to meet this specification.
Does the SN74CBTS6800DGVR support bidirectional signal flow?
Yes, the SN74CBTS6800DGVR supports fully bidirectional signal routing between port A and port B when the ON pin is low. Its FET-based architecture provides symmetrical on-state resistance (3–7 Ω) and capacitance, ensuring equal signal integrity in either direction. This makes the SN74CBTS6800DGVR suitable for data/address bus sharing and hot-swap arbitration protocols requiring reversible data paths.
What is the role of the BIASV pin on the SN74CBTS6800DGVR?
The BIASV pin sets the precharge voltage level applied to the B-port terminals when the ON pin is high. It accepts a user-supplied voltage from 1.3 V to VCC, allowing system designers to match termination levels, minimize ground bounce, or align with downstream receiver thresholds. During live insertion, this precharge prevents floating nodes and reduces noise coupling - a core function confirmed in the device's functional table and application description for the SN74CBTS6800DGVR.
Can the SN74CBTS6800DGVR operate at 3.3 V VCC?
No, the SN74CBTS6800DGVR is not rated for 3.3 V operation. Its recommended operating conditions specify VCC = 4 V to 5.5 V, and absolute maximum ratings cap VCC at 7 V. Operation below 4 V may result in undefined switching behavior, increased ron, or failure to meet TTL input thresholds. For 3.3-V systems, consider alternatives like SN74CBTLV3245PWR - but note the SN74CBTS6800DGVR itself requires 4–5.5 V.
What is the thermal performance of the SN74CBTS6800DGVR in its TVSOP package?
The SN74CBTS6800DGVR in the TVSOP-24 (DGV) package has a junction-to-ambient thermal resistance (θJA) of 86°C/W, as documented in the absolute maximum ratings table. This value assumes standard JEDEC test board conditions (2-layer board, 1-in² copper). With typical power dissipation below 1 mW in static operation and <10 mW under full switching load, the SN74CBTS6800DGVR remains well within safe operating limits up to 85°C ambient temperature.
SN74CBTS6800DGVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74CBTS
- Package/Case:
- 24-TFSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Bus Switch
- Circuit:
- 10 x 1:1
- Independent Circuits:
- 1
- Current - Output High, Low:
- -
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-TVSOP
SN74CBTS6800DGVR FAQ
1.How can I place an order for SN74CBTS6800DGVR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74CBTS6800DGVR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
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The price and inventory of SN74CBTS6800DGVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74CBTS6800DGVR is usually 5 days.
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Once your SN74CBTS6800DGVR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SN74CBTS6800DGVR?
For technical support, including SN74CBTS6800DGVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74CBTS6800DGVR requirements.
6.How does Aetrix verify that SN74CBTS6800DGVR is sourced from the original manufacturer or authorized distributors?
All SN74CBTS6800DGVR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SN74CBTS6800DGVR meets industry standards.
7.What is the process for return or replacement of SN74CBTS6800DGVR?
All SN74CBTS6800DGVR units undergo pre-shipment inspection (PSI). If there is an issue with SN74CBTS6800DGVR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SN74CBTS6800DGVR part is unused and in its original packaging.
Return procedure for SN74CBTS6800DGVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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